The summary interface (right hand section) includes a mimic diagram of the unit, together with
SUMMARY INTERFACE LEDS
LED INDICATION WHEN LIT
Green LED:
The unit is authorised to start or is already running
Red LED:
- Lit: circuit A or unit shut down by alarm
- Flashing: circuit A or unit running with alarm present
Red LED:
- Lit: circuit B or unit shut down by alarm
- Flashing: circuit B or unit running with alarm present
Red LED:
Water flow switch default or user safety lock open.
Green LED:
The evaporator pump is running.
Yellow LEDs:
From top to bottom - start/stop status of compressors A1, A2, A3 and A4 or B1, B2, B3 and B4. Flashing LED indicates that the circuit is in the protection or defrost mode (A or B).
Green LED:
The unit operates in heating mode.
Green LED:
The unit operates in cooling mode.
SUMMARY INTERFACE PUSH BUTTONS
BUTTON DISPLAY
Blue button: evaporator leaving or entering water temperature in °C
Gray button: outdoor air temperature in °C
Control point (setpoint + reset) in °C
kPaPress 1: circuit A/B discharge pressure in kPa
Press 2: circuit A/B saturated condensing temperature in °C
kPaPress 1: circuit A/B suction pressure in kPa
Press 2: circuit A/B saturated suction temperature in °C
Press 1: compressor A1/B1 operating hours in h/10 or h/100
Press 2: compressor A2/B2 operating hours in h/10 or h/100
4.2 - Unit start/stop control
4.2.1 - Description
The unit start/stop can be controlled by one of the following methods:
•Locally on the actual unit (Local control type)
•By remote control with the aid of user contacts (remote control type)
•By CCN control with the aid of the CCN (CCN control type)
The main interface includes a Start/Stop button which can be used to stop or start the unit in the local operating type or to select the remote or CCN operating type.
The available operating types are described in the following table.
The following operating types can be selected using the Start/Stop button:
OPERATINGTYPES
DESCRIPTION | |
LOFF | Local Off. The unit is halted in local mode. |
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Local On. The unit is in local control mode and is authorised | |
| to start. |
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Local On - timer control. The unit is in local control mode. It | |
| is authorised to start if the period is occupied. If the timer |
| program for unit operation is unoccupied, the unit remains |
| shut down until the period next becomes occupied. |
CCN* | CCN. The unit is controlled by CCN commands. |
rEM* | Remote. The unit is controlled by remote control contacts. |
MAST* | Master Unit. The unit runs as a master in a two unit lead/lag |
| arrangement. This is displayed if the unit is configured for |
| master/slave control. See section 5.19. |
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Legend
*Displayed if the configuration requires it.
Section 5.1 gives a more detailed description of the commands to start/stop the unit, analysed by operating type.
4.2.2 - Stopping the unit in local mode
The unit can be stopped in local mode at any time by pressing the Start/Stop button.
TO STOP THE UNIT
BUTTON ACTION | ||
Press the Start/Stop | C | LOFF |
button for less than |
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4 seconds (one short |
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press is enough). |
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If the button is | t | LOFF |
released, the unit stops |
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without the need for |
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further action. |
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4.2.3 - Starting unit and selecting an operating type
The unit can be started in local mode, or unit operating type can be changed at any time using the Start/Stop button. In the example that follows, the unit is stopped (LOFF) and the user wants to start the unit in local mode.
CHANGING THE OPERATING TYPE
BUTTON ACTION | ||||
| DISPLAY | DISPLAY | ||
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Continually press the operating type selection | C | LOFF | ||
button for more than 4 seconds. |
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Hold down the Start/Stop button. |
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The available operating types are displayed |
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one by one until the button is released. |
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| rEM |
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Release the Start/Stop button if the operating |
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type you want is displayed (in this example L- |
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On). "C" flashes in the |
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that the controller is awaiting confirmation. |
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Press the Enter button to confirm the | t | |||
operating type selected (in this example: L- |
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On). "t" is displayed in the |
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indicate the operating type selected. If the |
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Enter button is not pressed soon enough, the |
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controller will cancel the change and continue |
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to use the previous operating type. |
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